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15
4. WIRING DIAGRAM
BLK
BLK
GRN
LOGIC DIAGRAM
WIRING COLOR CODE
BLK BLACK
BLU BLUE
GRN GREEN
RED RED
WHT WHITE
Line voltage factory wiring
Low voltage factory wiring
Low voltage field wiring
(Exhaust)
BLU
RED
120VAC
60Hz
W1
GRN
F1
1
Power
LED
J1
M2
Damper Stepper Motors
Y
M1
WHT
BLK
A1
MAIN ELECTRONIC
ASSEMBLY
M1
Power
Supply
(15VDC)
Line
Neutral
K1
G
Gf
AC
Line
Filter
J1-2
F1
High Voltage
(120VAC)
J1-1
To J2
MCU
K1
M3
Stepper
Driver
To J5
WIRING DIAGRAM
BDM
1
5A/125VAC
J2 J3 J5 J6
J7
1
111
1
J7a
J15a
1
A2
LCD
ASSEMBLY
GRN
Ventilation Fan Motors
BLU
RED
M2
M3
M4
(Supply
)
(Supply
)
* Optional
(Recirc
)
(Exhaust
)
MCU
Serial Number
Isolation
Transformer
Motor Fuses
F2
F3
F4
F5
V
W
Gf
C
G
R
* Optional Central Forced-Air System Wiring
(Isolated 24VAC
)
OVR
LED
12V
D-
D+
GND
Main and Auxilliary
Controls Wiring
Thermistor
R1
RT1
(NTC)
Bridge
IPM
Motor 1
IPM
Motor 1
F3
F2
M2
To J
3
F5
F4
Central
Forced-Air
System
Relay
K1
PTC3
Isolated
Supply
(12VDC)
Isolated
Supply
(3.3VDC)
J9
J13
Logic
Supply
(3.3VDC)
PTC
2
To J9
Logic
Supply
(12VDC)
M4
Stepper
Driver
To J
6
M5
Stepper
Driver
To J7
PTC6
PTC4
To J13
R
TH1
To J
7a
(R1)
LCD
Assembly
Isolated GND
Digital GND
To J15a
(A2)
Recirculation
Damper (J6
) is
not present for
all models
J14
VE0452A
WARNING
• Risk of electric shocks. Before performing any maintenance or servicing, always disconnect the unit from its power source.
• This product is equipped with an overload protection (fuse). A blown fuse indicates an overload or a short-circuit situation. If the fuse blows, unplug the
product from the outlet. Discontinue using the unit and contact technical support.
!
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